baber/WOPTO huggingface dataset:
Patent WO-2021261182-A1 (WO)
Inventor: SHIMODA YOICHI
IPC: H01L33/62
Filed: 2021-06-01
Abstract: The light emitting device of the present invention comprises: a plurality of plate-like base materials which are disposed side by side and spaced apart from each other and are each made of metal; an insulating coating film formed so as to cover the upper surface and side surface of each of the plurality of base materials, the insulating coating film having an opening portion exposing one region of the upper surface of one of the plurality of base materials, and having a binding portion in which the plurality of base materials are bound together; a mounting pad made of metal provided so as to cover the one region of the upper surface of the one base material; and at least one light emitting element mounted on the mounting pad with a bonding member therebetween. The coating film includes a thin-film portion in which the coating film is formed in a thin-film shape surrounding an outer peripheral edge of the opening portion.
Patent WO-2021246484-A1 (WO)
Inventor: ODAKA RYOSUKE
IPC: B42D25/305
Filed: 2021-06-03
Abstract: Provided are: a production method that is for a smart card and that can impart excellent connection reliability and bending resistance to the smart card; a smart card; and a conductive particle-containing hot-melt adhesive sheet. According to the present invention, a conductive particle-containing hot-melt adhesive sheet that contains solder particles of an amorphous alloy in a binder containing a crystalline polyamide having a carboxyl group is interposed between, and thermocompression bonded to, a card member (10) and an IC chip (20). The crystalline polyamide having a carboxyl group can improve the solder wettability of the amorphous alloy to obtain excellent connection reliability. This is considered to be attributed to the flux effect of the carboxyl group existing in the crystalline polyamide, and, as a result, it becomes possible to prevent reduction in the elastic modulus of an adhesive layer caused by addition of a flux compound, and to obtain excellent bending resistance.
Patent WO-2021261215-A1 (WO)
Inventor: MASUDA HIROFUMI
IPC: C08K3/04
Filed: 2021-06-04
Abstract: Provided is an acrylic rubber bale having excellent Banbury processability and water resistance. An acrylic rubber bale according to the present invention is composed of acrylic rubber having a ion reactive group, wherein: the gel content of a methyl ethyl ketone-insoluble fraction is 15 wt% or less, optionally, all values measured in 20 spots are in a range of (average value ± 5) wt%, the pH is 6 or less, the ash content is between 0.0005 wt% and 0.2 wt%, and the total content of sodium, sulfur, calcium, magnesium and phosphorus in the ash is 90 wt% or more.
Patent WO-2021261472-A1 (WO)
Inventor: SUGIURA YUKA
IPC: A61B3/16
Filed: 2021-06-22
Abstract: This method for estimating the fluid state of a liquid has a step (a) for applying heat to a liquid, a step (b) for acquiring a temperature distribution of the liquid to which heat was applied, and a step (c) for estimating the fluid state of the liquid on the basis of the acquired temperature distribution. In addition, this system for estimating the fluid state of a liquid comprises a heating means 1 that applies heat to a liquid, a temperature distribution acquisition means 2 that acquires a temperature distribution of the liquid to which heat was applied, and an estimation means 3 that estimates the fluid state of the liquid on the basis of the acquired temperature distribution. Employing such a method and system for estimating the fluid state of a liquid makes it possible to estimate the flow of the liquid in a non-invasive manner.
Patent WO-2022269767-A1 (WO)
Title: Malaxeur
Inventor: SUGIMURA KENTARO
IPC: B28C5/18
Filed: 2021-06-22
Abstract: Ce malaxeur (10) comprend un tambour (58) et un boîtier de batterie (78). Un orifice d'admission (70) destiné à prendre un matériau (P) à pétrir est formé dans le tambour. Une partie de réception (90) est formée dans le boîtier de batterie. Une ouverture (102) pour insérer une batterie amovible (82), ou pour récupérer la batterie amovible (82), est formée dans la partie de réception. Le boîtier de batterie est retenu dans le malaxeur tout en étant orienté d'une manière autre qu'une orientation dans laquelle l'ouverture fait face au tambour.
Patent WO-2021261563-A1 (WO)
Inventor: TANAKA KOJI
IPC: C07D413/04
Filed: 2021-06-24
Abstract: In the production of crops in agriculture, horticulture and the like, the occurrence of damages by pests and the like has been still a major issue, and therefore the development of novel agricultural/horticultural insecticides has been demanded due to the evolution of pests resistant to the existing chemicals and the like. The present invention has found that a compound represented by general formula (1) (wherein X and Y independently represent an oxygen atom or a sulfur atom; R 1  represents a hydrogen atom or the like; R 2  represents a substituted phenyl group or the like; R 3  represents a hydrogen atom or the like; and R 4  represents a substituted phenyl group or the like) or a salt thereof exerts a high insecticidal effect against pests and the like in the agricultural and horticultural realms, and provides an insecticide for agricultural/horticultural use which contains the compound or a salt thereof as an active ingredient and a method for using the insecticide.
Patent WO-2022004714-A1 (WO)
Inventor: ENDO KUNIE
IPC: G06Q50/18
Filed: 2021-06-29
Abstract: 知的財産権の維持又は放棄の判断といった組織的な判断を支援する手法として、権利者の組織的な実態が的確に反映された実効性の高い手法を提供することを課題とする。　特許権Ｐを維持するための手続の可否に関する権利者Ｈにおける組織的な判断を支援するサーバ１において、取得部１０１は、権利者Ｈの組織の内的データＤｉと外的データＤｏとの夫々を取得する。一次判定部１５１は、取得部１０１により取得された内的データＤｉと外的データＤｏに基づいて、特許権Ｐを維持するための手続の可否に関する一次判定を行う。ＢＩツール生成部１５２は、一次判定部１５１による一次判定の結果に基づいて、特許権Ｐを維持するための手続の可否に関する判断の決裁権を有する決裁権者Ａの判断材料として利用し得るＢＩツールを生成する。これにより、上記課題を解決する。
Patent WO-2022014471-A1 (WO)
Title: Optical scanning device and method for driving micromirror device
Inventor: NISHIURA YOSUKE
IPC: G02B26/08
Filed: 2021-07-08
Abstract: This micromirror device is characterized by satisfying the relationship f 1 <f 2 , where f 1  is the resonance frequency about a first axis and f 2  is the resonance frequency about a second axis, and moreover is characterized in that when a mirror part is driven about the first axis and about the second axis simultaneously, the resonance frequency about the first axis changes by ∆f from f 1 . The mirror part is caused to precess by application of a first drive signal and a second drive signal that have a drive frequency f d  satisfying the relationship f 1 -∆f<f d  to a first actuator and a second actuator, respectively.
Patent WO-2022024825-A1 (WO)
Inventor: WENG YUFENG
IPC: F21S19/00
Filed: 2021-07-16
Abstract: Provided is a window lighting device capable of saving power by using sunlight. The window lighting device has a light source, a light guiding part, and a power supply that supplies electric power to the light source. The light guiding part has a light guide plate that guides light emitted from the light source, and a photovoltaic unit that receives sunlight to generate electric power. The light guide plate has: a light incident end surface that is opposed to the light source and on which light emitted from the light source is incident; and a light emitting part that is included in a predetermined principal plane of the light guide plate, which intersects the light incident end surface, and from which light guided inside the light guide plate is emitted. The photovoltaic unit is provided, on the light guide plate, at the side of an opposed principal plane opposed to the predetermined principal plane and supplies generated electric power to the power supply.
Patent WO-2022030445-A1 (WO)
Title: Copolymer, copolymer solution, photosensitive resin composition, cured article, method for producing copolymer, and method for producing copolymer solution
Inventor: MATSUURA HIROKI
IPC: C08F8/14
Filed: 2021-08-02
Abstract: The purpose of the present invention is to provide a copolymer which can provide a cured article having excellent solvent resistance under low-temperature curing conditions and can be used suitably as a heat-curable resin in various use applications including a color filter. The present invention is a copolymer characterized by comprising (A) an epoxy-group-containing structural unit represented by general formula (1) and (B) an acidic-group-containing structural unit represented by general formula (2), and also characterized in that the epoxy equivalent is 20000 or less. (In formula (1), R 1  represents a hydrogen atom or a methyl group; R 2  represents a direct bond or a bivalent organic group; and X represents an epoxy-group-containing group.) (In formula (2), R 3  represents a hydrogen atom or a methyl group; R 4  represents a direct bond or an organic group; R 5  represents a bond chain having a length of 2 atoms or more; Y represents an acidic group; and a represents 0 or 1.)
Patent WO-2022054476-A1 (WO)
Inventor: OGAWA YUUKI
IPC: H02M7/48
Filed: 2021-08-06
Abstract: This power conversion device has: first wiring (910) and second wiring (920) which are connected to a power supply (200); a first capacitor (520) connected to the first wiring and the second wiring; an electric component (501) comprising a plurality of switches (511, 512) connected in parallel to the first capacitor via the first wiring and the second wiring; and a second capacitor (600) which is connected to one among the first wiring and the second wiring and connected to a reference potential part (700) having a constant potential, wherein the impedance of a first conduction path, which does not pass the first capacitor between the power supply and the other side connection points (521, 522) connected to the first capacitor in the other of the first wiring and the second wiring, is higher than the impedance of a second conduction path which passes through the first capacitor between the other side connection points and the second capacitor.
Patent WO-2022064897-A1 (WO)
Title: Adhesive sheet
Inventor: WATANABE HIROYUKI
IPC: B32B27/00
Filed: 2021-08-17
Abstract: Provided is an adhesive sheet having excellent shock resistance, bending resistance, and light-shielding performance. An adhesive sheet 1 is provided with a foam base material 11, and an adhesive agent layer 12 provided on at least one surface of the foam base material 11. The foam base material 11 has a density of 0.40 g/cm 3  or more and a thickness of 300 μm or less. The adhesive sheet 1 has an impact absorption rate of 20% or more according to a falling ball impact test, and has a compression set of 10% or less when compressed to 25% of an initial thickness under the condition of 50°C for 24 hours.
Patent WO-2022064921-A1 (WO)
Inventor: KAWAKAMI GOU
IPC: G09B19/00
Filed: 2021-08-20
Abstract: A calculation server (10) acquires, as learning units of each school, each grade, and each class, educational progress information, for example, relating to mathematics of a student being a user of a student terminal (30) on the basis of a student DB (12i) and a class-based educational progress table (12f) when the student terminal (30) is connected thereto. The calculation server (10) determines the types of keys required for calculation corresponding to the educational progress information of the student on the basis of an educational progress-based key type table (12h), generates a soft keyboard corresponding to the determined types of keys, and causes the connected student terminal (30) to display the generated soft keyboard.
Patent WO-2022054878-A1 (WO)
Title: Instrument wherein attachment of enveloped virus is inhibited
Inventor: NAKAJIMA HIROYUKI
IPC: A61L31/12
Filed: 2021-09-09
Abstract: The problem addressed by the present invention is to provide an instrument wherein enveloped virus attachment is inhibited, an enveloped virus attachment reduction method, an enveloped virus testing kit, and a detection lower limit reduction method for enveloped virus testing.　The present invention relates to an instrument comprising, on at least a portion of a surface thereof, a coating film having a hydrophilic property, said instrument being such that enveloped virus attachment is inhibited. Preferably, the coating film includes a polymer of a monomer having a hydrophilic functional group.
Patent WO-2022065162-A1 (WO)
Title: Vehicle lighting fixture
Inventor: HONDA TAKAHIKO
IPC: F21Y115/30
Filed: 2021-09-15
Abstract: Provided is a vehicle lighting fixture (1), which comprises a road surface rendering function in addition to a function that serves as a headlight or a marker light. The vehicle lighting fixture is configured so as to comprise: an optical unit that performs the function of a headlight or a marker light; and a road surface rendering unit that performs the function of projecting a rendering pattern on a road surface. The optical unit and the road surface rendering unit both perform irradiation with a common projection lens (20).
Patent WO-2023042375-A1 (WO)
Inventor: ONO SHINGO
IPC: G01M11/02
Filed: 2021-09-17
Abstract: 本開示の目的は、測定対象物の光伝搬方向における任意の位置での反射を測定するに際し、精密な光学系の調整を省略し測定を簡易化するとともに、測定可能距離レンジを拡大する技術を提供することにある。　本開示は、第一の連続光を出力する第一の光源と、第二の連続光をローカル光として出力する第二の光源と、前記第一の連続光の分岐した一方を測定対象物に照射して得られる反射光と、前記第一の連続光の分岐した他方である参照光と、前記ローカル光との合波から得られる受光信号Ｉ（ｔ）にデジタル信号処理を施す信号処理部と、を備え、前記信号処理部は、前記受光信号Ｉ（ｔ）と前記受光信号を時間τだけずらした受光信号Ｉ(ｔ＋τ)との自己相関関数を計算し、前記自己相関関数のピークの位置を用いて、前記測定対象物における反射を測定する、光反射測定装置である。
Patent WO-2022065419-A1 (WO)
Title: Electrode catalyst layer and membrane electrode assembly
Inventor: HAMADA NAOKI
IPC: H01M8/10
Filed: 2021-09-24
Abstract: The objective of the present invention is to provide an electrode catalyst layer having excellent durability by suppressing deterioration due to repeated start and stop, and also to provide a membrane electrode assembly including the electrode catalyst layer. An electrode catalyst layer (3) suitable for a polymer electrolyte fuel cell (1) includes carbon particles (11) carrying a catalyst and a polymer electrolyte (12), and also includes at least one fiber material from among carbon fibers (13) and organic electrolyte fibers (14), the thickness of the electrode catalyst layer (3) after performing a start-stop test of 1 V to 1.5 V for 10,000 cycles being 70% or more of the thickness of the electrode catalyst layer (3) before the start-stop test.
Patent WO-2022080270-A1 (WO)
Title: フルオロブテンの保管方法
Inventor: SUZUKI ATSUSHI
IPC: C07C21/18
Filed: 2021-10-08
Abstract: 保管中に分解が進行しにくいフルオロブテンの保管方法を提供する。一般式Ｃ 4 Ｈ x Ｆ y で表され且つ一般式中のｘが０以上７以下、ｙが１以上８以下、ｘ＋ｙが８であるフルオロブテンが、マンガン、コバルト、ニッケル、及びケイ素のうち少なくとも一種を金属不純物として含有するか又は含有しない。このフルオロブテンを、前記含有する場合のマンガン、コバルト、ニッケル、及びケイ素の濃度の和を１０００質量ｐｐｂ以下として、容器内に保管する。
Patent WO-2022091849-A1 (WO)
Title: HOT-DIP Al-Zn-Si-Mg-PLATED STEEL SHEET, SURFACE-TREATED STEEL SHEET, AND COATED STEEL SHEET
Inventor: YOSHIDA MASAHIRO
IPC: B32B15/095
Filed: 2021-10-18
Abstract: The purpose of the present invention is to provide a hot-dip Al-Zn-Si-Mg-plated steel sheet having stably superior corrosion resistance.　In order to achieve said purpose, the present invention is a hot-dip Al-Zn-Si-Mg-plated steel sheet comprising a plating film, the hot-dip Al-Zn-Si-Mg-plated steel sheet being characterized in that the plating film has a composition containing 45-65 mass% of Al, 1.0-4.0 mass% of Si, and 1.0-10.0 mass% of Mg, the remainder comprising Zn and unavoidable impurities, and the diffraction intensity of Mg 2 Si and MgZn 2  in the plating film according to X-ray diffraction analysis satisfying relationship (1). (1): Mg 2 Si (111)/MgZn 2  (100) ≤ 2.0
Patent WO-2022107534-A1 (WO)
Inventor: SAKOTA KOJI
IPC: F16C17/04
Filed: 2021-10-19
Abstract: The present disclosure provides a thrust air bearing for supporting a rotary shaft. This thrust air bearing comprises a plurality of foil units arranged side by side in an annular shape. The foil units each include: a top foil portion; and a bump foil portion provided integrally with the top foil portion and arranged on the opposite side to the top foil portion in the circumferential direction forming the annular shape. Each of the foil units is arranged so as to have the top foil portion overlap on the bump foil portion of another foil unit adjacent thereto.
Patent WO-2022085739-A1 (WO)
Inventor: KO CHANGSU
IPC: G16H20/10
Filed: 2021-10-20
Abstract: Ce dispositif de gestion d'essais cliniques : comprend une unité de stockage qui stocke des informations de période indiquant une première période dans laquelle un essai en aveugle d'administration d'un médicament test ou d'un placebo à un sujet est effectué, et une seconde période dans laquelle un essai ouvert d'administration du médicament test est effectué après que la première période se soit écoulée ; acquiert des informations sur l'heure d'administration indiquant l'heure d'administration à laquelle le médicament test ou le placebo a été administré au sujet ; et acquiert des informations sur la condition physique indiquant la condition physique du sujet auquel le médicament test ou le placebo a été administré, et également des informations sur l'heure de la condition physique, qui est l'heure à laquelle les informations sur la condition physique ont été obtenues. Sur la base d'une requête, les informations sur l'heure de la condition physique, les informations sur l'heure d'administration et les informations sur l'heure d'administration correspondant à un sujet prescrit sont émises vers un premier dispositif terminal qui peut être parcouru par le sujet. Si le moment auquel la requête est faite se trouve à l'intérieur de la première période, une détermination est effectuée pour au moins ne pas envoyer au premier dispositif terminal les informations d'administration indiquant le médicament test ou le placebo administré au sujet. Si le moment auquel la requête est faite se trouve à l'intérieur de la seconde période, une détermination est effectuée pour ne pas envoyer au premier dispositif terminal les informations sur l'heure d'administration, les informations sur la condition physique, les informations sur l'heure de la condition physique et les informations d'administration dans la première période.
Patent WO-2023067778-A1 (WO)
Inventor: OOKAWA Riki
IPC: H04W72/04
Filed: 2021-10-21
Abstract: Le terminal selon l'invention comprend une unité de réception qui reçoit un premier message demandant l'activation d'un groupe de cellules secondaires comprenant une ou plusieurs cellules secondaires, et une unité de transmission qui transmet un second message rejetant l'activation du groupe de cellules secondaires lorsqu'une première condition spécifique indiquant que l'exécution de l'activation du groupe de cellules secondaires est inappropriée, est remplie.
Patent WO-2023073784-A1 (WO)
Inventor: UETA YOSHIHIRO
IPC: H05B33/14
Filed: 2021-10-25
Abstract: A light emitting element according to the present invention is provided with a first electrode (D1), a second electrode (D2), a light emitting layer (QL) that is arranged between the first electrode (D1) and the second electrode (D2), and a charge function layer (T2) that is arranged between the light emitting layer and the second electrode. The light emitting layer (EM) comprises a quantum dot layer (QL) that contains a plurality of quantum dots (QD); the charge function layer (T2) comprises a nanoparticle layer (NL) that contains a plurality of nanoparticles (NP); and the average particle diameter of the plurality of nanoparticles is larger than the average particle diameter of the plurality of quantum dots.
Patent WO-2022118582-A1 (WO)
Inventor: TAKEMOTO HAJIME
IPC: B66B5/02
Filed: 2021-10-29
Abstract: このワイヤロープ検査装置（１０１）は、ワイヤロープ（Ｗ）に対して磁界を印加する励磁部（１０）と、ワイヤロープ（Ｗ）に対して相対的に移動しながらワイヤロープ（Ｗ）の磁束を検知する検知コイル（３１）と、ワイヤロープ（Ｗ）の外表面の少なくとも一部からの飛び出し部分（Ｗａ）を検知する飛び出し検知部（３２）と、飛び出し検知部（３２）からの検知信号に基づいて、飛び出し部分（Ｗａ）が検知コイル（３１）に接触する前に、検知コイル（３１）をワイヤロープ（Ｗ）から離間する方向に移動させる駆動部（４０）と、を備える。
Patent WO-2022137946-A1 (WO)
Title: Thermoforming device and thermoforming method
Inventor: TERAMOTO KAZUNORI
IPC: B29C51/42
Filed: 2021-11-23
Abstract: A thermoforming device according to the present invention has a masking plate and a heater block. A plurality of the heater blocks are disposed with spaces therebetween in a surface direction of the masking plate. The thickness of the masking plate is 0.2-3.0 mm. The interval of the spaces is 1-15 mm, and the interval of the spaces is set to a magnitude of at least five times the thickness of the masking plate. Heat to be transmitted to the masking plate from a high temperature heater block is more easily transmitted in the thickness direction of the masking plate than in the surface direction of the masking plate, and is more easily transmitted to the sheet than to a portion, of the masking plate, corresponding to a low temperature heater block, whereby a temperature difference is provided at each site in the masking plate.
Patent WO-2022124421-A1 (WO)
Inventor: TANAKA TAKESHI
IPC: F24F110/10
Filed: 2021-12-10
Abstract: オゾン濃度測定装置１６は、オゾン濃度測定用プログラムを格納する記憶部１６ｂと、記憶部からプログラムを読み出して該プログラムを実行する制御部１６ｃと、制御部に接続されてオゾン濃度を測定するオゾンセンサ１５と、オゾンセンサに清浄空気を送風する清浄空気送風装置１７と、制御部１６ｃに接続された送受信部１６ａと、を備え、制御部１６ｃは、オゾンセンサで所定空間のオゾン濃度を測定したデータからオゾン濃度を取得して記憶部に格納し、記憶部に格納したオゾン濃度に関する測定データを送受信部によりネットワークを介して管理センター３０に送信する。オゾン濃度監視システム１は、所定空間内に配置するオゾン発生装置１１と、オゾン濃度測定装置１６と、オゾン濃度測定装置にネットワークを介して接続した管理センター３０とで構成し、オゾン濃度測定装置で測定したオゾン濃度に関する測定データを送受信部１６ａからネットワークを介して管理センターに送信し、管理センターにて所定空間のオゾン暴露量を監視する。
Patent WO-2022138901-A1 (WO)
Title: 撮像装置、または撮像装置を備えた電子機器
Inventor: YAMAGUCHI TAKUMI
IPC: G02B5/20
Filed: 2021-12-24
Abstract: 【課題】カメラの小型化、薄型化が実現するために、波長制限フィルタ機能を持った画素を有する撮像装置または前記撮像装置を備えた電子機器を提供する。 【解決手段】受光部と、 前記受光部に隣接する受光部と前期受光部との間に配置された遮光部と、 前記遮光部の間で光が入射できる開口部と、 前記開口部を覆う領域と を有する裏面照射型の画素を備える撮像装置において、 前記開口部を覆う領域の屈折率をｎ１とした場合に、前記画素の前記開口部の幅λ１を、 λ１＝波長λ０÷ｎ１ とする画素を備えることで、カットオフ波長がλ０の撮像装置を実現する。
Patent JP-WO2020250436-A1 (JP)
Title: ビル内情報管理装置
IPC: G06Q50/10
Filed: 2019-06-14
Abstract: 設備の位置等の情報を得るだけでなく、設備等への要求を提供することができるビル内情報管理装置を提供する。ビル内情報管理装置は、ビルに設けられた設備と自律移動体と相互通信する設備通信部と、前記設備通信部が前記設備と前記自律移動体とから受信した情報のうち、前記設備の位置と前記設備の稼働状況と前記自律移動体の位置と前記設備のエネルギー消費量と前記自律移動体のエネルギー消費量の少なくとも一つの情報を記憶する各種情報記憶部と、を備えた。
Patent JP-WO2020188758-A1 (JP)
Title: 回路基板
IPC: H05K1/02
Filed: 2019-03-19
Abstract: 回路基板（１）は、プリント配線板（１１）と、プリント配線板（１１）に実装されたチップセラミックコンデンサ（２）と、を備える。回路基板（１）は、回路基板（１）の面内に、剛性が相対的にプリント配線板（１１）よりも高い補強部品が実装される。補強部品は、回路基板（１）の面内において補強部品に対向する側のチップセラミックコンデンサ（２）の周縁部から予め決められた離間距離の範囲内に配置されている。回路基板（１）は、チップセラミックコンデンサの配置領域の制約を緩和し、基板設計の自由度を向上させることが可能である。
Patent JP-WO2021070940-A1 (JP)
Title: 積層体、それを有するコーティング部材、および積層体の製造方法
IPC: B32B7/025
Filed: 2020-10-09
Abstract: 課題：カーボンナノチューブ層が安定して積層された積層体、それを有するコーティング部材、および積層体の製造方法を提供すること。解決手段：樹脂組成物を主に含む絶縁層２０と、絶縁層２０の上に積層された、繊維幅が１０００ｎｍ以下の微細繊維状セルロースを主に含むセルロース繊維層３０と、セルロース繊維層３０の上に積層された、カーボンナノチューブを主に含むカーボンナノチューブ層４０とを有する、積層体。
Patent WO-2022168797-A1 (WO)
Inventor: NAKAMURA KENTARO
IPC: H03H9/25
Filed: 2022-01-31
Abstract: Provided is an elastic wave device with which it is possible to suppress higher-order modes in a wide band.　This elastic wave device 1 comprises: a crystal substrate 3; a silicon nitride film 4 provided on the crystal substrate 3; a lithium tantalate layer 6 (piezoelectric layer) provided on the silicon nitride film 4; and an IDT electrode 7 provided on the lithium tantalate layer 6, the IDT electrode 7 having a plurality of first and second electrode fingers 18, 19.